Attachment for log-sawing machines.



F. E. BARTHULUMEW.

ATTACHMENT FDR LUG SAWING MACHINES.

(Application filed Apr. 18, 1901.!

Patented Nov. 5, 190|.

(NoModel.)

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UNITED STATES FRANK E. BARTHOLOMEV,

yPATENT OFFICE.

or KALKASKA, MICHIGAN.

ATTACHMENT FOR LOG-S'AWING MACHINES.

SPECIFICATION forming part of Letters PatentNo. 685,812, dated November 5, 1901. Application filed April 18,1901. serial No. 56,385. (N6 model.)

T0 all whom, it may concern.-

Be it known that I, FRANK E. BARTHoLo- MEW, a citizen of the United States,residing at Kalkaska, in the county of Kalkaska and State of Michigan, have invented certain new and useful Improvements in Attachments for Log-Sawing Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an attachment for sawing-machines,particularly log-sawing machines, for arresting the feed of the log as it passes beneath the saw to cut o a desired length of butt or block.l

The object of the invention is to provide a simple and effective device of this character which may be adj usted to accurately gage the length of block to be cut and which is adapted to automatically dump the block and return to its normal position for further operation.

With this and other objects in view, which will appear as the nature of the invention is better understood, the invention consists of certain novel features ot' construction, combination,and arrangement of parts, as will be hereinafter more fully described, andparticularly pointed ont in the appended claims.

In the accompanying drawings, Figure lis a top plan vieW of so much of a sawing-machine as is necessary to illustrate the nature of the present invention, showing the application of the invention thereto. Fig. 2 is a side elevation and partial section thereof, illustrating the operation of the invention in full and broken lines.

Referring now more particularly to the drawings, the numeral l represents the earriage-fra-me of a sawmill of the ordinary or any approved construction, the same comprising parallel track-rails 2, suitably connected and carrying at their forward ends bearing-blocks 3, in which a transverse feedshaft 4, carrying spur-wheels 5, which engage and feed the log forward to be cut, is rotatably mounted.

6 is the truck or carriage which supports the log and is provided with wheels or rollers to traverse the rails 2, and 7 is the saw, which may be reciprocated through the instrumentality of any preferred type of mechanism and is preferably mounted so as to be raised and lowered to throw it into and out ofaction. The mechanism for operating the saw may be of any desired type and is not herein shown, as it forms no part of the present invention.

In carrying my invention into practice I arrange at the forward end of the carriageframe l an automatic stop and gaging device, constructed as follows: Pivotally mounted upon the feed-shaft 4 by means of a bearing S, so as to tilt in a vertical plane, is a bar 9, which is disposed between'an'd arranged parallel with the track-rails 2 and is provided at its outer or forward end with an adjustable stop 10, provided at its upper. end with a spur or'tooth ll to retain the log in position against outward or upward movement. This stop is vertically disposed and is provided at its lower end with a foot-rest l2, adjustably connected to the bar by means of bolts 13, adapted to be passed through openings 14, formed in said bar. The stop is reinforced and braced by a diagonal brace-rod l5, secured at its upper end thereto by a bolt I6 and at its lower end to the bar 9 by means of a bolt 17, which is also adapted to be passed through one of the said openings la. The brace-rod 15 in addition to reill-` forcing the stop l0 serves the further purpose of an inclined plane for facilitating the dump or discharge of the butt or block sawed olf from the log, as will appear more fully hereinafter. The stop l0 and brace-rod l5 are adapted to be adjusted along the bar 9 toward and from the saw to arrest the movement of the log at any desired point in advance of the saw, so as to provide for the sawing off of blocks4 or butts of different lengths. The bar 9 is provided at its rear end with an eye or socket I8, into which is fitted one end of a counterbalancing-lever 19, which is held within said socket by means of a set-screw 2O or any other preferred construction of fastening means. This lever is preferably disposed at right angles to the bar 9, but may haveits outer end angularly projected to form a longer arln 2l, so arranged as to provide for its proper connection with the bar 9 and to clear certain portions of the frame of the sawing-machine. (Not necessary to be herein shown.) On the said arm IOO 21 of the counterbalancing-lever 19 is mounted a sliding counterweight 22, which is adapted to beV secured thereto at any desired point by a set-screw 23.

The operation of the device is as follows: The logis supported in the usual manner upon the truck or carriage 6 and at its forward end is engaged with the spur-wheels 5 on the feed shaft 4, which act to feed it forwardly to be operated upon by the saw 7. As the forward end of the log comes in contact with the stopv 10 the motion of the log is arrested, and the saw may then be thrown into operation vto cut or saw off the block or butt. Upon the severance of the block or butt from the body or remainder of the log the weight thereof causes the forward end of the bar 9 to tilt or l drop downward, and thus allow the block or butt to roll off, the inclined brace l5 serving in this connection as an Ainclined plane to facilitate the dumping of the block. Upon the removal of the weight of the block from the bar 9 the counterbalancing-lever 19 acts to restore the bar 9 to its normal position, and the action before described is repeated, the movement of the log being automatically arrested and the blocks or butts discharged as soon as cnt, so as to render the services of an attendant or the operation of grippers by the engineer entirely unnecessary. The length of the block or butt to be cut may be regulated wi thin predetermined limits by simply adjnsting the stop lO toward or from the saw 7 and correspondingly varying the posi: tion of the counterweight 22 to compensate for the change in position of said stop, as will be readily understood. The lever 19 and connterweight 22 are so proportioned and ar ranged as to normally counterbalance the weight of the bar 9 and its connections, so as to maintain said bar in a horizontal position ready for operation, and by simply adjusting the weight 22, as before described, the leverage or counterbalancing action exerted by the lever 19 may be varied accordingly as the stop l0 is moved toward or from the saw, so as to insure a sensitive automatic movement o f the bar 9 in tilting to discharge the block and then returning to its normal position for further operation.

From the foregoing description, taken in connection with the accompanying drawings,

struction may be madewithin thescope ofV the invention without departing from the spirit or sacrificing any of the advantages thereof.

be similarly connected to an auxiliary shaft mounted below said shaft 4 and have its forssi For instance, the bar 9 instead of v being pivotally connected to the shaft 4 may Y' asf ward portionoffset in such manner as to asc sume the normal operative position shown and described in the present instance.

Having thus described my invention,what

I claim, and desire to secureby Letters Pate ent., is-

Vl. YIn a stop and gage attachment for saw- V .l ingr machines, the combination, with feed, I mechanism and a saw, of a tilting bar, a stop Y longitudinally adjustable upon one end of the bar and provided with a spur and an inclined brace serving as an inclined plane'for the free discharge of the log, a lever connect- .Y l i' ed with the opposite end of the barand projecting at an angle thereto, and an adjustable ing-machines, the combination, with a trackway, and a saw reciprocating transversely thereto, of a transverse shaft mounted in bearings upon the trackway and provided with feed-wheels forfeeding the log to the Saw, a bar extending longitudinally between the tracks of the trackwayand mounted Yto tilt in a vertical plane upon said shaft, a stop adjustably mounted upon one end of the bar, a counterbalancing-lever connected'with theV other end of the. bar and extending trans. versely beyond one side of the trackway,v and 8o counterweight carried by said lever, substan- .Y Y tially as described. g

A 2. In a stop and gage attachment for saw-V a counterweight adjustably mounted upon Y said lever, substantially as described.

In testimony whereof I haye hereunto set` l my hand in presence of two subscribing witnesses. j

FRANK E. BARTHOLOMEW. Witnesses:

T. D. HoBBs, N.A BRENT. 

